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| All Patents in class 74/89.27 | |||||
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| Number | Date | Patentee | Title | Type | |
| 434,576 | Aug. 19, 1890 | H.B. Wyman | Drilling Machine | stone boring and drilling machines | |
| 1,108,107 | Aug. 18, 1914 | A.L. De Leeuw | Feed Mechanism for Machine Tools | metalworking variable speed mechanisms | |
| 3,103,827 | Sep. 17, 1963 | N.R. Logan | Dual Operator for Slides | metalworking machines | |